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