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