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