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