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