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