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