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