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