In this visualization, each object in the diagram is represented by a specific shape and color to convey its identity and status. The following elements are used:

1. **Floors**: Each floor is depicted as a long horizontal rectangle, representing the spatial layout of a building. Floors are stacked vertically in ascending order, with the lowest floor at the bottom. The color of the floor is a neutral light grey to ensure high contrast with other objects.

2. **Passengers**: Passengers are shown as smaller rectangles placed on the left side of each floor rectangle. The color blue represents passengers, indicating their presence on a floor. The position of the passengers is fixed to the left to avoid overlap with elevators.

3. **Elevators**: Elevators are represented by rectangles smaller than the floor rectangles, placed on the right side of each floor. There are two designated areas for fast and slow elevators. The color of the elevator indicates its status:
   - **Green**: An elevator with no passengers (empty).
   - **Yellow**: An elevator that is partially full.
   - **Red**: A fully occupied elevator.

4. **Legend**: The legend is placed outside the main diagram to avoid overlap and provides a mapping of colors to their meanings. This includes the color representations for passengers and each type of elevator occupancy.

5. **Text Labels and Status**: Each object, whether a floor, passenger, or elevator, has a text label inside its shape for identification. The status of elevators is shown as a fraction (e.g., "0/2"), indicating the current number of passengers over the capacity. The text is in a contrasting color (white or black) to ensure readability against the background color.

6. **Layout**: The layout ensures no objects overlap. Floors are aligned in a grid, with elevators and passengers placed in designated areas to the right and left, respectively. The legend is placed in a corner to maximize the use of space and maintain clarity.

This encoding allows someone unfamiliar with the domain to understand the spatial arrangement of floors, the presence and status of passengers, and the occupancy of elevators through visual cues and labels.