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