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