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