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