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