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