In the diagram, each object and its attributes are represented by specific shapes, colors, sizes, and positions to convey their status and relationships within the domain "floor-tile".

- **Tiles**: Each tile in the grid is represented by a rectangle. The color of the rectangle indicates its status: 
  - Green signifies a "clear" tile, meaning it is not painted and not occupied by a robot.
  - Red indicates an "occupied" tile, meaning a robot is currently positioned on it.
  - A painted tile would be represented by a distinct color such as blue or yellow, depending on the color of paint applied.

- **Robots**: Robots are depicted as circles smaller than the tiles they occupy. The color of the circle corresponds to the color the robot is currently holding:
  - White for a robot holding white paint.
  - Black for a robot holding black paint.

- **Text Labels**: Each tile and robot has a text label inside their respective shapes, clearly indicating their identifier and status. Text color is chosen to contrast with the background for readability: 
  - Black text on lighter backgrounds.
  - White text on darker backgrounds.

- **Legend**: A legend is included to map colors to their meanings, ensuring clarity. The legend is placed outside the main grid to avoid overlapping with any objects in the diagram.

- **Size and Position**: The relative size of objects (e.g., robots being smaller than tiles) and their positions (e.g., robots centered on tiles) are used to depict the spatial relationships between elements. This helps visualize adjacency and movement possibilities.

The diagram is designed to be intuitive, allowing someone unfamiliar with the domain to understand the status and relationships of each object based on the visual cues provided.