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