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