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