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