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