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