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