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