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