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