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