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