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