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