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