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