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