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