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