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