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