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