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