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