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