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