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