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