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