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