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