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