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