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