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