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