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