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)(11,15)(12,13)(14,16)(17,18,23,28)(19,30,32,25)(20,33,36,44)(21,38,40,46)(22,29,24,27)(26,35,45,37)(31,42,47,48)(34,41,39,43)(2,6)(7,8)(9,10)(11,14)(12,13)(15,16)(17,19,23,32)(18,25,28,30)(20,34,36,39)(21,24,40,22)(26,42,45,48)(27,38,29,46)(31,37,47,35)(33,43,44,41)(1,3,5,4)(2,7,6,8)(10,13)(14,15)(17,20,22,35,23,36,24,37)(18,26,27,44,28,45,29,33)(19,31,40,34,32,47,21,39)(25,41,46,42,30,43,38,48)(9,11,12,16)(10,14,13,15)(17,21,24,32,23,40,22,19)(18,25,29,38,28,30,27,46)(20,34,37,31,36,39,35,47)(26,43,33,42,45,41,44,48)(1,4,5,3)(2,7,6,8)(17,22,23,24)(18,27,28,29)(19,21,32,40)(20,35,36,37)(25,38,30,46)(26,44,45,33)(31,39,47,34)(41,48,43,42)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.