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