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