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