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