In the diagram, each object is represented using specific geometric shapes and colors to convey its identity and status.

1. **Floors**: 
   - Shape: Large, horizontally long rectangles. 
   - Color: Light blue to indicate their function as floors.
   - Position: Stacked vertically with floor 0 at the bottom, increasing upwards.
   - Label: Each floor is labeled with its identifier (e.g., floor_0).

2. **Passengers**: 
   - Shape: Smaller rectangles compared to floors and elevators.
   - Color: Green to indicate they are waiting for an elevator.
   - Position: Placed on the left side of each floor, horizontally aligned.
   - Label: Each passenger is labeled with their identifier (e.g., p0).

3. **Elevators**: 
   - Shape: Rectangles smaller than floors but larger than passenger rectangles.
   - Color: 
     - Green for elevators with available capacity.
     - Red for elevators at full capacity.
   - Position: Placed on the right side of each floor. Fast elevators are placed closer to the right edge, while slow elevators are positioned slightly left of the fast elevators.
   - Label: Each elevator is labeled with its identifier and current capacity status (e.g., fast0 0/2).

4. **Legend**: 
   - Purpose: To clarify the meaning of colors and shapes in the diagram.
   - Contains patches representing colors for passengers, available elevators, full elevators, and floors.
   - Positioned outside the main diagram to avoid overlap with any objects.

5. **Overall Layout**:
   - The diagram is designed to ensure no objects overlap.
   - Text labels and statuses are placed inside their respective shapes with high contrast for readability.
   - The legend is positioned to the side of the diagram to provide context without obstructing the view of the main elements.