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)(14,20)(15,22)(16,21)(17,23)(19,27)(24,32)(25,37)(26,34)(28,36)(29,33)(30,35)(31,39)(38,42)(40,41)(3,5)(4,8)(6,9)(7,10)(11,13,17,26)(12,18,23,34)(14,24,28,40)(15,29,16,25)(19,31,35,42)(20,32,36,41)(21,37,22,33)(27,39,30,38)(3,6,7,4)(5,9,10,8)(11,14)(12,19)(13,24)(15,27)(16,30)(17,28)(18,31)(20,21)(22,36)(23,35)(25,38)(26,40)(29,39)(32,37)(33,41)(34,42)(5,10)(8,9)(11,14)(12,20)(13,24)(15,30)(16,27)(17,28)(18,32)(19,21)(22,35)(23,36)(25,39)(26,40)(29,38)(31,37)(33,42)(34,41) involution — undirected(11,15,17,16)(12,21,23,22)(13,25,26,29)(14,27,28,30)(18,33,34,37)(19,20,35,36)(24,38,40,39)(31,41,42,32)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.