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