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