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