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