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