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