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