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