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