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