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