I’ve utilized a semi State Diagram based on UI to help explain exploratory testing.
I found out that User Experience staff utilizes a UA : User interface Architecture to show all the UI and flows.
Anyways, you can see the concept here :
https://drive.google.com/folderview?id=0B_0LdM1CVycIVTFWNWpXNFEyQmM&usp=sharing
The positive test cases are outlined, and from there the negative test cases can be tested and if you want to document exploratory testing, you can branch out from the diamonds.