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