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