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