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)(19,28,31,24)(20,32,35,25)(21,37,23,26)(29,39,46,45)(30,40,38,41)(33,42,47,48)(34,43,36,44)(1,2)(3,6)(4,5)(7,8)(9,11)(10,13)(12,16)(14,15)(17,19,22,31)(18,24,27,28)(20,33,35,47)(21,30,23,38)(25,42,32,48)(26,40,37,41)(29,34,46,36)(39,44,45,43)(10,14)(13,15)(17,20,22,35)(18,25,27,32)(19,29,31,46)(21,36,23,34)(24,39,28,45)(26,44,37,43)(30,47,38,33)(40,42,41,48)(2,5)(6,8)(11,16)(13,15)(17,19)(18,24)(20,29)(21,38)(22,31)(23,30)(25,39)(26,41)(27,28)(32,45)(33,36)(34,47)(35,46)(37,40)(42,43)(44,48) involution — undirected(1,3,4,7)(2,6,5,8)(17,21,22,23)(18,26,27,37)(19,30,31,38)(20,34,35,36)(24,40,28,41)(25,43,32,44)(29,33,46,47)(39,48,45,42)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.