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