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