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