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