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