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