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