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