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