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