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