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