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)(33,34,39,36)(35,40,38,42)(37,41,46,44)(43,47,45,48)(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)(34,36)(40,42)(41,44)(47,48)(2,3)(4,11)(8,10)(12,13)(18,20)(23,26)(24,28)(30,32)(33,35,39,38)(34,40,36,42)(37,45,46,43)(41,48,44,47)(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)(33,36,39,34)(35,42,38,40)(37,44,46,41)(43,48,45,47)(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)(33,37,39,46)(34,41,36,44)(35,43,38,45)(40,47,42,48)(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)(33,38,39,35)(34,42,36,40)(37,43,46,45)(41,47,44,48)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.