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