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