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