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