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)(33,34,39,43)(35,44,47,38)(36,40,46,41)(37,42,45,48)(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)(34,38)(36,45)(37,46)(39,47)(40,42)(41,48)(43,44)(2,6)(3,4)(10,13)(11,12)(19,27)(20,29)(23,30)(24,32)(33,36,39,46)(34,40,43,41)(35,45,47,37)(38,42,44,48)(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)(34,41)(35,45)(37,47)(38,48)(39,46)(40,43)(42,44)(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)(34,42,43,48)(35,46,47,36)(38,40,44,41)(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)(34,35)(36,48)(37,40)(39,44)(41,45)(42,46)(43,47)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.