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