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