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