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