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