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