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