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