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