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