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