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