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