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