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