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