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