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