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