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