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