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