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