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