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