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