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