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