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