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