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