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