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