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