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