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)(9,13)(11,15)(12,17)(16,19)(18,20)(21,22,27,32)(23,29,34,36)(24,35,33,28)(25,31,26,30)(6,10)(7,15)(8,17)(11,19)(12,13)(14,18)(21,23)(22,28)(24,25)(26,33)(27,34)(29,31)(30,36)(32,35) involution — undirected(2,4)(5,7,8,16,9,15,17,20)(6,11,12,19,13,14,10,18)(21,24,25,23,27,33,26,34)(22,29,30,35,32,36,31,28)(7,15)(11,14)(16,20)(18,19)(21,25,27,26)(22,30,32,31)(23,24,34,33)(28,36,35,29)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.