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