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