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