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