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