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