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