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