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