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