One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(11,16)(12,14)(17,18)(19,22)(20,25)(21,26)(23,28)(24,30)(27,31)(29,32) involution — undirected(6,8)(9,10,13,15)(11,14,16,12)(18,19)(23,25)(24,26)(31,32)(1,2)(3,4)(5,6)(7,8)(9,11)(10,14)(12,15)(13,16)(17,19,22,18)(20,25,28,23)(21,26,30,24)(27,32,29,31)(9,12,13,14)(10,11,15,16)(17,20)(18,23)(19,25)(21,29)(22,28)(24,32)(26,31)(27,30)(1,2)(3,4)(9,11)(10,14)(12,15)(13,16)(17,21)(18,24)(19,26)(20,27)(22,30)(23,31)(25,32)(28,29) involution — undirectedA 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.