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