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