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