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)(7,17,20,29,21,12,19,28)(8,22,24,32,26,31,25,13)(18,30,23,33,35,36,34,27)(5,7)(6,12)(8,23)(9,19)(10,20)(11,21)(13,30)(14,28)(15,17)(16,29)(18,24)(22,27)(25,35)(26,34)(31,33)(32,36) involution — undirected(2,4)(5,8,11,26)(6,13,15,32)(7,18,21,35)(9,25,10,24)(12,27,17,33)(14,22,16,31)(19,23,20,34)(28,36,29,30)(6,14,15,16)(12,28,17,29)(13,31,32,22)(27,30,33,36)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.