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