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