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