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