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