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