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