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