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)(17,18,23,26)(19,24,21,22)(20,25,28,32)(27,31,30,29)(33,34,39,44)(35,42,37,40)(36,46,47,41)(38,43,45,48)(1,3,7,4)(2,8,6,9)(5,12,13,11)(10,16,14,15)(17,19,23,21)(18,24,26,22)(20,27,28,30)(25,31,32,29)(33,35,39,37)(34,40,44,42)(36,38,47,45)(41,43,46,48)(2,6)(3,4)(5,13)(15,16)(19,21)(20,28)(22,24)(25,32)(33,36,39,47)(34,41,44,46)(35,45,37,38)(40,48,42,43)(1,4,7,3)(2,9,6,8)(5,11,13,12)(10,15,14,16)(17,20)(18,25)(19,27)(21,30)(22,29)(23,28)(24,31)(26,32)(33,37,39,35)(34,42,44,40)(36,38,47,45)(41,43,46,48)(1,5,7,13)(2,10,6,14)(3,11,4,12)(8,15,9,16)(17,21,23,19)(18,22,26,24)(20,27,28,30)(25,31,32,29)(33,38)(34,43)(35,36)(37,47)(39,45)(40,41)(42,46)(44,48)(1,6,7,2)(3,9,4,8)(5,14,13,10)(11,16,12,15)(17,22)(18,19)(20,29)(21,26)(23,24)(25,27)(28,31)(30,32)(33,34)(35,40)(36,41)(37,42)(38,43)(39,44)(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.