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