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