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