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