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