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