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