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