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