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