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