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