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