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