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