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