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