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