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