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