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