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)(11,12)(13,16)(14,15)(18,22)(23,24)(25,26,29,28)(27,30,31,32)(1,3,4,8)(2,5,7,6)(9,11,15,16)(10,13,14,12)(17,18)(19,23)(20,24)(21,22)(27,31)(30,32)(9,12,15,13)(10,16,14,11)(17,19,21,20)(18,23,22,24)(25,27,29,31)(26,30,28,32)(1,2)(3,5)(4,7)(6,8)(9,13,15,12)(10,16,14,11)(17,18)(19,23)(20,24)(21,22)(1,3)(2,6)(4,8)(5,7)(9,14,15,10)(11,13,16,12)(17,20,21,19)(18,23,22,24)(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.