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