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