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