How do you guys present/show FSM diagrams?

I want to represent an FSM diagram (table) where it has a lot of states, lot of inputs and ofcourse lot of Action as well.

As of now we are just representing it in a Table with some keys, to understand what that keys means we have to check the definition of Key. I mean it is ok, but I don't feel this is the best representation.

I am planning to write a simple Html code, when ever I hover the mouse it will show details of that state/Action etc. But thinking of other ideas….

Do you guys have any idea how to represent an FSM ?