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