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