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