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