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