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