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