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