Your question asks about the workflow but your screenshot shows a process. Those are 2 different things in OpenERP.

To see a workflow:

1. Activate the developer mode.
2. Go to the list/form view of a document that is in the application you want to see the workflow of.
3. In the developer drop-down list, select "Edit workflow"
4. In the list, click on the workflow you want to see.
5. Switch to the diagram view in the top right corner.

To see a process:

1. Activate the developer mode.
2. Go to the list/form view of a document that is in the application you want to see the process of.
3. Next to the view's title, click on the question mark icon.