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