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