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