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