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