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