One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10)(11,16)(12,15)(13,14)(17,18,22,27)(19,23,30,26)(20,31,34,38)(21,35,37,25)(24,32,41,28)(29,42,36,39)(33,46,47,44)(40,43,48,45)(2,5)(3,7)(10,14)(11,12)(17,19,22,30)(18,23,27,26)(20,32,34,28)(21,36,37,29)(24,31,41,38)(25,42,35,39)(33,43,47,45)(40,46,48,44)(2,5)(6,8)(9,11,13,12)(10,15,14,16)(17,20,30,32,22,34,19,28)(18,24,23,38,27,41,26,31)(21,33,36,45,37,47,29,43)(25,40,39,46,35,48,42,44)(1,3,4,7)(2,6,5,8)(10,14)(15,16)(17,21,22,37)(18,25,27,35)(19,29,30,36)(20,33,34,47)(23,39,26,42)(24,40,41,48)(28,43,32,45)(31,44,38,46)(2,5)(6,8)(9,12,13,11)(10,16,14,15)(17,19,22,30)(18,23,27,26)(20,28,34,32)(21,36,37,29)(24,38,41,31)(25,42,35,39)(33,45,47,43)(40,44,48,46)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.