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)(19,27)(20,24)(21,23)(22,31)(25,30)(26,29)(28,32)(2,6)(7,8)(9,11)(10,13)(12,15)(14,16)(18,23)(19,28)(20,30)(22,29)(24,27)(25,32) involution — undirected(1,3,5,4)(2,7,6,8)(17,19,29,28,21,30,22,20)(18,24,31,25,23,32,26,27)(1,3,5,4)(2,7,6,8)(11,15)(13,16)(17,20,29,19,21,28,22,30)(18,25,31,32,23,27,26,24)(1,4,5,3)(2,7,6,8)(18,23)(24,32)(25,27)(26,31)A 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.