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