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