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