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