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