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