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