One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(10,13)(14,15)(17,18)(19,22)(20,23)(21,24)(25,28)(26,29)(27,30)(31,32) involution — undirected(5,6)(7,8)(9,10,12,13)(11,15,16,14)(17,19,20,26)(18,22,23,29)(21,27,28,32)(24,30,25,31)(1,2,3,4)(6,8)(18,23)(22,29)(24,25)(30,31)(9,11,12,16)(10,14,13,15)(18,24)(21,28)(22,30)(23,25)(27,32)(29,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.