I'm sorry, but I cannot generate visual diagrams directly. However, I can guide you on how to use the Sentence Diagram Generator to create a diagram for the sentence "The area should be sized to support movements without lifting an item and without rolling over mats in the area."

1. Input the Sentence: Enter the sentence into the Sentence Diagram Generator.
2. Analyze the Structure: The tool will break down the sentence into its grammatical components, identifying the subject, verb, objects, and modifiers.
3. Customize the Diagram: You can adjust styles or formats as needed.
4. Generate the Diagram: Once satisfied with the input and settings, generate the visual representation.

This process will help you visualize the grammatical structure effectively.