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