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