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