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