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