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