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