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