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