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