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