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