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