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