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