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