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