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