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