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