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