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