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