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