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