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