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