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