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