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