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