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