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