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