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