Open the Playmaker Editor from the PlayMaker Main Menu.
FSM selection tools.
2. Graph View
Edit States and Transitions.
Edit the selected FSM/State.
Debug and Play tools.
Playmaker windows are regular Unity windows that can be docked and added to tabs so you can make your own layout.
The Unity window system is fairly intuitive - just drag windows around and you'll see where they can dock.
Remember to save your layout!