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