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