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