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