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