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