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