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)(7,12,19,27,18,28,25,29)(8,20,23,32,22,13,24,31)(17,33,21,36,34,26,35,30)(1,3,4,2)(5,7,9,18)(6,12,15,28)(8,21,22,35)(10,25,11,19)(13,30,20,36)(14,27,16,29)(17,24,34,23)(26,32,33,31)(2,3)(5,8)(6,13)(7,17)(9,22)(10,24)(11,23)(12,26)(14,31)(15,20)(16,32)(18,34)(19,35)(21,25)(27,36)(28,33)(29,30) involution — undirected(6,14,15,16)(8,22)(12,27,28,29)(13,31,20,32)(17,34)(21,35)(23,24)(26,36,33,30)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.