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