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