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