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