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