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