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