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)(23,32,24,35)(25,29,26,31)(28,33,36,34)(2,4)(5,7)(6,10)(8,14)(9,13)(11,18)(12,17)(15,20)(16,19)(21,23)(22,28)(24,27)(25,33)(26,34)(29,32)(30,36)(31,35) involution — undirected(7,13)(10,17)(14,19)(18,20)(21,24,27,23)(22,28,30,36)(25,34,26,33)(29,32,31,35)(7,13)(10,17)(14,19)(18,20)(21,25,27,26)(22,29,30,31)(23,33,24,34)(28,32,36,35)(5,8,9,16)(6,11,12,15)(7,14,13,19)(10,18,17,20)(22,30)(28,36)(29,31)(32,35)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.