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