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