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