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