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