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