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