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