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