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)(17,18,21,24)(19,22,26,30)(20,23,28,32)(25,29,27,31)(33,34,39,43,38,36,35,40)(37,44,45,47,46,41,42,48)(2,6)(7,12)(8,13)(14,16)(17,19,21,26)(18,22,24,30)(20,27,28,25)(23,31,32,29)(33,35,38,39)(34,40,36,43)(37,45,46,42)(41,48,44,47)(1,3)(2,7)(4,10)(5,9)(6,12)(8,14)(11,15)(13,16)(17,20)(18,23)(19,25)(21,28)(22,29)(24,32)(26,27)(30,31)(33,36,38,34)(35,40,39,43)(37,41,46,44)(42,48,45,47)(3,9)(7,12)(10,15)(14,16)(18,24)(20,28)(22,30)(25,27)(33,37,38,46)(34,41,36,44)(35,42,39,45)(40,47,43,48)(1,4,5,11)(2,8,6,13)(3,10,9,15)(7,14,12,16)(37,46)(41,44)(42,45)(47,48)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.