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