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