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