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