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