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