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