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