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