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