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