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