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