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