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