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