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