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