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