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