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