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