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