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