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