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