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