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