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