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