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