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