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