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