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