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