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