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