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