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