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