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