One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,6)(7,8)(9,11)(10,12) involution — undirected(5,7)(6,10)(8,11)(9,12)(13,14,19,23)(15,24,27,42)(16,21,18,33)(17,29,32,43)(20,35,38,26)(22,28,40,31)(25,41,34,39)(30,36,44,37)(2,4)(5,8,9,10)(6,7,11,12)(13,15)(14,20)(16,25)(17,30)(18,34)(19,27)(21,36)(22,39)(23,38)(24,29)(26,31)(28,35)(32,44)(33,37)(40,41)(42,43)(2,4)(6,11)(7,12)(13,16,19,18)(14,21,23,33)(15,25,27,34)(17,28,32,31)(20,36,38,37)(22,29,40,43)(24,41,42,39)(26,30,35,44)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.