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