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