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