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)(17,18,21,27,23,28,22,26)(19,29,31,24,33,46,32,40)(20,25,38,43,37,45,36,44)(30,41,47,39,35,48,34,42)(1,3)(2,6)(4,11)(5,10)(7,15)(8,14)(9,12)(13,16)(17,19,23,33)(18,24,28,40)(20,34,37,47)(21,32,22,31)(25,41,45,48)(26,46,27,29)(30,38,35,36)(39,43,42,44)(1,4,5,12)(2,7,8,16)(3,9,10,11)(6,13,14,15)(17,19)(18,24)(20,35)(21,31)(22,32)(23,33)(25,42)(26,29)(27,46)(28,40)(30,37)(34,38)(36,47)(39,45)(41,43)(44,48)(4,12)(7,16)(9,11)(13,15)(17,20,21,38,23,37,22,36)(18,25,27,43,28,45,26,44)(19,30,31,47,33,35,32,34)(24,39,46,48,40,42,29,41)(2,8)(3,10)(7,16)(9,11)(17,21,23,22)(18,26,28,27)(19,31,33,32)(20,36,37,38)(24,29,40,46)(25,43,45,44)(30,34,35,47)(39,48,42,41)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.