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