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