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