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