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