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