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