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