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