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