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