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