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