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