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