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