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