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