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