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