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