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