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