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