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