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