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