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)(11,13)(12,14)(15,16)(17,18,22,23)(19,21,25,30)(20,24,27,31)(26,28,29,32)(1,3,5,4)(2,6,8,7)(9,11,12,15)(10,13,14,16)(18,23)(19,21)(20,27)(25,30)(26,32)(28,29)(1,3,5,4)(2,7,8,6)(10,14)(13,16)(17,19,22,25)(18,21,23,30)(20,28,27,32)(24,29,31,26)(1,4,5,3)(2,6,8,7)(17,20,22,27)(18,24,23,31)(19,26,25,29)(21,28,30,32)(17,21)(18,25)(19,23)(20,29)(22,30)(24,32)(26,27)(28,31) 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.