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