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