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