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