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