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