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