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