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