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