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