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