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