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