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