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