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