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