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