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