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