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