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