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