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