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