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