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