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