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