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