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