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