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)(25,26,32,35)(27,28,37,33)(29,39,38,31)(30,40,36,34)(1,2)(3,6)(4,7)(5,8)(9,11,15,12)(10,16,13,17)(14,19,22,20)(18,23,21,24)(25,27,32,37)(26,33,35,28)(29,40,38,34)(30,31,36,39)(1,3)(2,5)(4,8)(6,7)(9,10,15,13)(11,16,12,17)(14,18,22,21)(19,23,20,24)(25,28)(26,27)(29,36)(30,38)(31,34)(32,33)(35,37)(39,40)(1,3)(2,6)(4,8)(5,7)(9,12,15,11)(10,17,13,16)(14,19,22,20)(18,23,21,24)(25,29,32,38)(26,31,35,39)(27,34,37,40)(28,36,33,30)(9,13,15,10)(11,17,12,16)(14,21,22,18)(19,24,20,23)(25,30,32,36)(26,34,35,40)(27,31,37,39)(28,38,33,29)(1,2)(3,5)(4,7)(6,8)(9,14)(10,18)(11,19)(12,20)(13,21)(15,22)(16,23)(17,24)(25,31)(26,29)(27,36)(28,34)(30,37)(32,39)(33,40)(35,38) 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.