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