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