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