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