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