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)(17,18)(19,22)(20,24)(21,23)(25,26)(27,32)(28,31)(29,30)(1,3,5,4)(2,6,7,8)(17,19,21,28)(18,22,23,31)(20,26,30,27)(24,25,29,32)(9,11,12,16)(10,13,14,15)(17,18)(19,25)(20,29)(21,23)(22,26)(24,30)(27,31)(28,32)(1,4,5,3)(2,6,7,8)(19,26)(20,30)(22,25)(24,29)(27,28)(31,32)(18,23)(22,31)(24,29)(25,32) 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.