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