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