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