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