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