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