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