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