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