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)(19,22)(20,25)(21,24)(23,28)(26,29)(27,31)(30,32)(33,34,40,37)(35,41,38,47)(36,45,44,42)(39,43,46,48)(1,3,6,9)(2,7,8,4)(5,11,14,16)(10,15,13,12)(18,19)(23,25)(24,26)(30,31)(33,35,40,38)(34,41,37,47)(36,39,44,46)(42,48,45,43)(2,8)(3,9)(10,13)(11,16)(17,18,22,19)(20,23,28,25)(21,24,29,26)(27,30,32,31)(33,36)(34,42)(35,39)(37,45)(38,46)(40,44)(41,48)(43,47)(1,4,6,7)(2,9,8,3)(5,12,14,15)(10,16,13,11)(17,19,22,18)(20,25,28,23)(21,26,29,24)(27,31,32,30)(33,37,40,34)(35,41,38,47)(36,45,44,42)(39,48,46,43)(1,5,6,14)(2,10,8,13)(3,11,9,16)(4,12,7,15)(17,20,22,28)(18,23,19,25)(21,27,29,32)(24,30,26,31)(33,38,40,35)(34,41,37,47)(36,46,44,39)(42,48,45,43)(1,2)(3,7)(4,9)(5,10)(6,8)(11,15)(12,16)(13,14)(17,21,22,29)(18,24,19,26)(20,27,28,32)(23,30,25,31)(33,39,40,46)(34,43,37,48)(35,44,38,36)(41,42,47,45)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.