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