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