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