One vertex per element, one color per generator, with an edge from x to x·s.
(5,6,12,22,10,8,11,15)(7,16,25,17,19,13,20,30)(9,14,26,34,24,21,23,28)(18,27,35,36,33,29,32,31)(1,2,3,4)(5,7,11,20,10,19,12,25)(6,13,15,17,8,16,22,30)(9,18,23,32,24,33,26,35)(14,27,28,31,21,29,34,36)(2,4)(5,8,10,6)(7,17,19,30)(9,21,24,14)(11,15,12,22)(13,25,16,20)(18,31,33,36)(23,28,26,34)(27,35,29,32)(5,9,11,23,10,24,12,26)(6,14,15,28,8,21,22,34)(7,18,20,32,19,33,25,35)(13,27,17,31,16,29,30,36)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.