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