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