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