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