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