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