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