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