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