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