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