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