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