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