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)(11,13)(12,15)(14,16)(18,21)(20,24)(1,3,5,8)(2,6,7,4)(10,11)(14,15)(17,18,22,21)(19,24,23,20)(26,29)(30,32)(9,10,13,11)(12,14,16,15)(17,19)(18,20)(21,24)(22,23)(25,26)(27,30)(28,29)(31,32)(1,3)(2,4)(5,8)(6,7)(9,11,13,10)(12,15,16,14)(17,20,22,24)(18,23,21,19)(1,4)(2,3)(5,6)(7,8)(9,12,13,16)(10,14,11,15)(17,21,22,18)(19,24,23,20)(25,27,28,31)(26,30,29,32)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.