State transition diagrams synthetically represent with arrows how
transitions occurred, from a state 
an other 
. As with
phase space, there is no time axis, but instead a "folding" of
space so to plot only the names of states.
How are state transition diagrams drawn? The name of each encountered
state (category) is written, and then arrows are added for each
transition observed, going from state to state . An example
will clarify this matter.