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