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