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