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