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