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