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)(13,20,25,37)(14,19,28,34)(15,22,31,40)(16,21,32,39)(17,33,30,23)(26,38,41,36)(27,42,29,35)(4,7)(8,10)(11,13,16,26,17,27,31,28,18,25,32,41,30,29,15,14)(12,19,22,35,23,36,39,37,24,34,40,42,33,38,21,20)(3,5,6,9)(4,8,7,10)(11,14,15,29,30,41,32,25,18,28,31,27,17,26,16,13)(12,20,21,38,33,42,40,34,24,37,39,36,23,35,22,19)(13,25)(14,28)(19,34)(20,37)(26,41)(27,29)(35,42)(36,38) 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.