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