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)(17,18,22,25)(19,23,26,20)(21,24,29,31)(27,30,32,28)(33,34)(35,40)(36,39)(37,41)(38,42)(43,45)(44,47)(46,48)(1,3)(2,7)(4,10)(5,9)(6,11)(8,14)(12,13)(15,16)(17,19)(18,23)(20,25)(21,27)(22,26)(24,30)(28,31)(29,32)(33,35)(34,36)(37,43)(38,39)(40,42)(41,44)(45,48)(46,47) involution — undirected(2,8)(3,11)(4,13)(5,15)(19,26)(20,23)(21,29)(24,31)(33,36,38,40)(34,39,42,35)(37,45,46,44)(41,43,48,47)(1,3)(2,7)(4,10)(5,9)(6,11)(8,14)(12,13)(15,16)(17,20,22,23)(18,19,25,26)(21,30,29,28)(24,32,31,27)(33,36)(34,35)(37,44)(38,40)(39,42)(41,43)(45,46)(47,48)(1,4)(2,9)(3,12)(5,14)(6,13)(7,15)(8,16)(10,11)(17,21)(18,24)(19,27)(20,28)(22,29)(23,30)(25,31)(26,32)(33,35)(34,40)(36,42)(37,43)(38,39)(41,45)(44,48)(46,47) involution — undirected(1,5,6,15)(2,10,8,12)(3,9,11,16)(4,14,13,7)(17,19)(18,23)(20,25)(21,27)(22,26)(24,30)(28,31)(29,32)(33,37,38,46)(34,41,42,48)(35,43,39,47)(36,44,40,45)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.