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