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