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