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