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