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