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