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