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