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