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