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