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