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