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