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