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