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