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