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