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