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