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