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