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