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