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