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