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