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