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