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