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