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