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