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