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