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