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