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