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