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)(17,18,21,26,22,25,30,32)(19,27,29,24,20,23,28,31)(1,3,5,8)(2,6,7,4)(10,13)(11,14)(15,16)(17,19)(18,23)(20,22)(21,29)(24,32)(25,27)(26,31)(28,30)(9,11)(10,14)(12,16)(13,15)(17,20,22,19)(18,24,25,31)(21,29,30,28)(23,26,27,32)(1,4,5,6)(2,3,7,8)(9,10,12,13)(11,14,16,15)(17,21)(19,28)(20,29)(22,30)(23,27)(26,32)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.