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