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