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