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