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