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)(24,27)(25,29)(26,34)(28,32)(31,36)(33,35)(5,6,9,12)(7,13,14,10)(8,17,16,11)(15,18,20,19)(21,23,26,32,27,31,25,35)(22,28,29,30,24,33,34,36)(2,4)(5,7)(6,10)(8,15)(9,14)(11,18)(12,13)(16,20)(17,19)(21,24,27,22)(23,28,31,33)(25,29,26,34)(30,35,36,32)(7,14)(10,13)(15,20)(18,19)(21,25)(22,29)(24,34)(26,27)(28,33)(32,35) involution — undirected(5,8,9,16)(6,11,12,17)(7,15,14,20)(10,18,13,19)(22,24)(23,31)(29,34)(32,35)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.