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