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