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