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