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