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