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)(21,22)(23,29)(24,34)(25,27)(26,32)(28,31)(30,35)(33,36)(2,3)(7,13)(8,16)(10,17)(11,15)(21,22)(23,30)(24,28)(25,27)(26,33)(29,35)(31,34)(32,36) involution — undirected(5,7,9,13)(6,10,12,17)(8,14,16,19)(11,18,15,20)(21,23,31,35,25,33,24,32)(22,26,34,36,27,30,28,29)(1,3,4,2)(7,13)(10,17)(14,19)(18,20)(21,22)(23,26)(24,28)(25,27)(29,32)(30,33)(31,34)(35,36)(5,8,9,16)(6,11,12,15)(7,14,13,19)(10,18,17,20)(22,27)(26,30)(28,34)(29,36)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.