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