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