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