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