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