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