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