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