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