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)(12,16)(13,14)(17,18)(19,27)(20,23)(21,25)(22,26)(24,30)(28,32)(29,31)(33,34,39,37)(35,41,36,40)(38,45,46,42)(43,47,44,48)(1,3,6,9)(2,7,5,11)(4,10,14,12)(8,15,13,16)(17,19)(18,24)(20,27)(21,28)(22,29)(23,30)(25,26)(31,32)(33,35,39,36)(34,40,37,41)(38,43,46,44)(42,47,45,48)(2,5)(3,9)(8,13)(10,12)(21,29)(22,28)(25,31)(26,32)(33,35,39,36)(34,40,37,41)(38,44,46,43)(42,48,45,47)(1,4)(2,8)(3,10)(5,13)(6,14)(7,15)(9,12)(11,16)(17,20,23,18)(19,27,30,24)(21,25,29,31)(22,32,28,26)(33,36,39,35)(34,41,37,40)(38,44,46,43)(42,48,45,47)(1,3)(2,7)(4,12)(5,11)(6,9)(8,16)(10,14)(13,15)(17,21,23,29)(18,25,20,31)(19,28,30,22)(24,26,27,32)(33,37,39,34)(35,40,36,41)(38,45,46,42)(43,47,44,48)(1,5,6,2)(3,11,9,7)(4,13,14,8)(10,16,12,15)(17,22,23,28)(18,26,20,32)(19,29,30,21)(24,25,27,31)(33,38)(34,42)(35,43)(36,44)(37,45)(39,46)(40,47)(41,48)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.